Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries full responsibility for disclosing behavior. It only adds 'bounded' and 'small named entity,' which is vague. It does not mention rate limits, error conditions, whether activity includes transactions and/or balances, or what 'bounded' concretely means (e.g., limit or time range).
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.